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Finding the Fourth Proportional to 860.08, 1,187.04 and 580.72

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Solution

The fourth proportional to 860.08, 1,187.04 and 580.72 is: 801.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.08 : 1,187.04 = 580.72 : x
  2. Step 2: Convert to fraction form
    860.08/1,187.04 = 580.72/x
  3. Step 3: Cross multiply
    860.08x = 1,187.04 × 580.72
  4. Step 4: Simplify right side
    860.08x = 689,337.87
  5. Step 5: Solve for x
    x = 689,337.87/860.08
  6. Step 6: Final answer
    x = 801.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.